Fume-arrester.



yL... D. RYCE' a L. WALLBRSTBIN.

rtm1: ABBESTBR.

' ArPLxoATlox FILED 11u31, 1911.

Patented July 2, 1912.

Ill.

UNrriiD sTri-is PATENT OFFICE.

LORENZQ D. ROYCE, OF OAKLAND, AND LOUIS VVALLERSTEIN, OIE"r SAN FRANCISCO, CALIFORNIA.

Fulvia-ARRESTER.

V To all 'whom it may concern.

-Be it known t-liat we. LORENZO D. ROYCE, residing at Oakland` Alameda county, California, and Louis lYanL-iins'rizix, of the city :and county of San Francisco, California, -botli`citizens of the United States. have Iinvented new and useful Improvements in Fuine-Ari'esters, of which the following is -f Tli'sinveiition relates to a smelting furnaceand particularly pertains to certain details/of construction therein by means of `:which the smoke and fumes generated in the `furnace may be condensed and mineral particles separated therefrom.

' 4 It isthe object of this invention to provide a siiieltiiig furnace of the above character passage 3 which forms a continuation of, thc` which is ysimple in construction and etiicient Vin. operation.

"urther objects will become apparent in the following description. l

The invention consists of the parts and the construction rand combination of parts, as

hereinafter more fully, described and claimed having reference to the accompanying d vings, in whichnear its rear end, as indicated at a, then rises4 a short distance at an angle, as indicated at 3), tofform a'llepressioii c in the bottom of the chamber, and again slopes downwardly and upwardly from the .elevated portion b to forni a second depression el a short distance' rearward of the depression Lc the depression 'dbeing shallower than the depression c, as shown. .The rear end of the chamber opens at a point adjacent tothe ,depression 0l', te a gradually diveiging )'liorizon'tally` disposed stack 2,l which is 'formed of brick- Work in any suitable manner, and of a length. approximately equal thatl .fOf the chamber i The stack .2 opensat its outer .ed to an enlarged horizontally., disposed Specification of Letters Patent.

Application filed May 31,

gaie 1 is a vertical longitudinal section of the invention. Fig. 2 is a horizontal sec-v Patented July 2, 1912.

1911. Serial No. 630,322.

auxiliary vertically disposed stack 5 leads i from the stack ont a point adjacentto its outer endL and mounted in the stack 5 is a.

damper G which is connected by a rod 7 to a similar damper S near the outer end of the passa-gpJ 3. The dampers 6 and 8 are adaptedy toe actuated by means of therod 7 in such manner as to close one damper and open the other simultaneously.

The Aores to be sinelted aie delivered tothe interior of the chamber A through a pair of feed hoppers 9-9, disposed on opposite sides of ythe chamber A a short distance from its forward end. The smelting of the ores delivered from the feed hoppers 9-9 is accomplished by mea-ns of a. series' of low pressure oil burners, in this case four in number, and indicated at e-f-g, -z,; the burners ef being disposed inthe forward end of the chamber A, whiley the burners g-i extend through the opposite side of the chamber, as shown in Fig. 2; the burners g,-h being staggered in relation to each other,

It is manifest that while We have shown the burners as consisting of four in number, that as many more or less may be employed as the occasion may require. These burners are necessarily of a peculiar type in order t0 accomplish the results desired, which type of burner is fully disclosed in the Patent #633,761 issued to August Johnson under date of September 26, 1899. The air supplied these burners is delivered through a' pipe 10, which is passed a number of times through the retort A beneath the bottom thereof at a point near its forward end, so thatv the vair passing through the' pipe 10 will be l heated before being delivered to the burners. The upper face of the pipe 10 isapproximately levelwith the floor of t-he retortand is covered with sand so as to lregulate the temperature of'tlie airiifthel'iipe..y Tlir is` delivered to the pipe 10 through a supply pipe 11 which connects with a fan 12 `of any suitable description, whichainsures a constant flow of air to the vburners.

'A series of troughs 13 Aare disposedl at hntervals in the bottom of the stacks or passages 2 and 3; the upper edge of the troughs 13 being flush with the bottom of the passages. A These troughs extend the width of the passages and pass through the 'sidewall thereof, as shown in Figs. 2 and 1;

is delivered theretoexterior to the passages 2 3 from supply-pipes 1i in an)1 desired quantity. which ma;v be regulated as desired. Arranged above each trough in the passages 2 3 adjacent to the ceiling thereof is a horizontally disposed perforated pipe 15, through which a current of cold air is discharged downward upon the surface of the water in the trough. Similarl)T arranged perforated pipes 16 are placed in the en.- .larged .passage 3, through which jets ofv water or other liquids are discharged into the troughs t-hereunder. It is manifest that as many troughs 13 and the corresponding perforated pipes 1 5-16 may be employed throughout the length of the passages 2*-3 as may be desired.. l

The operation of the invention is a"fol lows: The ore to be smelted is delivered to the chamber A through the feed hoppers v9 9 and is acted upon b v the intense heat of the flames delivered from the burners e--f-'g-hg in such manner asto melt. the ore and cause it to ow down the inclined bottom d, where `it collects in they depression c: the scum or slag passing over the ridge formed at b and collecting in the-depression (I: the molten metal and scum or ldag being drawn 0H through tart holes 17-18 in the usual manner. The flames passingfrom the' chamber A. enter the small endy of the passage 2 and are subjected to the cooling acytion of the streams of'cold yair vdischarged through the' pipesl. which `converts the flame into black smoke before it reaches the. enlarged passage 3. The air discharged through the' pipes 15 drives the 'flames againstthe water in the troughs 13` which' acts to reduce the flames to smoke and at 'the same time generates a certain amoiuitof steam. the moist vapors resulting therefrom 'mingling with Athe stuokedischarged into the passage The flamesand smoke are drawn into the passages 3 by the suction of lthe tan twhich creates ajstrong draft throughout, the length ot' the passages. The Smoke passing through the passage 3 is acted upon by the waterand air discharged from the pipes 15 and 16 in such manner' that. thc'mineral particles therein may be deposited in the water in the troughs- 13, from whence they are drawn oi and precipi-` tatedin any' suitable manner. AIf desired, chemicalsmay be discharged -from either of the pipes 1G'in the chamber, as a mcans'of.

killing the fumes. The vpassages2-3 are of such length and the air and water pipes 15-16 and water troughs 13 are of'such number that the ames, smoke and fumes from the retort-A will be completely con densed beforerea'ching the fan 4,so that no poisonous gases will be discharged'from the end of the stack.v The vertical stack 5 is employed only in starting the tires; 'the damper 8 bein-g then closed and the damper G opened. By tapering the passage 2,-3, as shown. the cooling of the hot flames and gases isgreatly facilitated; this gradual; enlargement of the passages' also allowingY for the addi'ti'onalair delivered theretofromv the pipes 15.;

- Havingthus describedour inventiomwhat we' claim and desire to secureby Letters Patentis4 1. In a fume arrester, the combination of a divergent flue into the-smaller end of which the fumes "'areVadmitted,.alarger elongated chamber connecting"l with. and

forming a-Leontinuaton of said vilue, 'a-

controlled draft vdevice connecting vwith .said chamber, transversely d isposedwater troughs in the bottom of the ue Aand continuation, with batiie plates vand exterior dis-S.

charge ends and water ietl pipes located transversely'above and discharging 4'across the pathof the .fumes andinto the troughs.

A fume arrester comprising a flue horizontally disposed and gradutilliY increasing in diameter fronf'the fronttothe rear. and

a chamber forming'afeontinuation of *the`A y larger end of said flue.. a -draft device-and -uptake at the end of fthe' larger chamber,

dampers inythefdraft"passage and thevup- #take and connections whereby one of-said dam'pers .may loe-.closedv and the other lopened in unison` and water-containing troughs disposed acrossthe bottom of theflne and said cha-mher. f A

- 3. -A fume arrester'eomprising a Hue hori.

zontally disposed and 'gradually increasing in diameter from the front to the rear. and Y a chamber .forming a vcontinuation of the larger end of said flue. adraftdeviceand uptake at.` the'fend of the larger device. dalnpers in thedrat't passage and the up take. and connections whereby one of said* 4dampcrs ma)v lic-closed and the other opened in unison. and water-containing troughs disposed. across the bottom of the flue and con tinuat-ion. and extending? to theoutside A,ot-

the wall. sa'iduall` dipping 'intothe water to 'ferm-a trap for the gases. Y 7

lzontaJl d1spesedand gradual in dimsioter front to 4. A fume arrester eomprisinig aline horiincreasing a'. chamber `ai. continuation of the larger end of said Hue, a draft device and uptake at the end of the larger chamber, dempers in they draft passage, and the up'- V teke,rand connections whereby one of said dampers may closed and the other opened in unison, and water-containing troughs disposed acmssthe bottom of the flue and connuation, und extending to the outside of thev wall, -said wall dipping into the water Y to form a trap for the I '16,1 in-'the troughs and air jets discharging baiiie partil 0 said troughs. 5. In s, .fume arrester, the combination of' a divergent ue into the smaller end of e rear, and

which the' fumesv are admitted, a larger elongated chamber connectin with Vand forming a continuation of sai flue, a con-Y trolled draft connecting with said chamber,

transversely dis osed water troughs in the LORENZO D. ROYCE. LOUIS WALLERSTEIN.

Witnesses:

G. H. STRONG, J. H. HEBRING. 

